<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <form action="">
        用户名:<input type="text"><br>
        密码:<input type="password" placeholder="密码"><br>
        <!-- 提交按钮 -->
        <input type="submit" value="提交"><br>
        <!-- 重置按钮 -->
        <input type="reset" value="重置"><br>
        <!-- 普通按配合js使用钮 -->
        <input type="button" value="普通">
    </form>
</body>

</html>